Hazard Warning Signs (WW)
Hazard Warning Signs are SABS approved safety signs defined under South African National Standards (SANS) to warn of the presence of a hazard and to support quick, informed decision-making where risk may exist.
The sizes and materials listed above reflect the standard options available for purchase. If you require a specific size, material, or specification not listed on our website, please contact us to discuss manufacturing options.
What these signs are used for
These signs are used to communicate the warning of a hazard, supporting safer behaviour by drawing attention to risks that may not be immediately obvious. Typical applications include warnings of fire, explosion, radiation, toxic substances, steps, low headroom, obstacles, and other potential hazards.
How they are visually identified
These symbolic safety signs display a black pictogram on a yellow triangular background, surrounded by a black border, in accordance with SANS safety signage conventions to ensure consistent recognition across South African environments.
Materials and design proportions
The height, width, or diameter of the pictogram occupies between 75 percent and 90 percent of the corresponding dimensions of the backing sheet. Signs are manufactured in Chromadek steel or ABS plastic, depending on the intended installation environment.
Approved sizes
SABS approved sizes for safety signs are 150 × 150 mm, 190 × 190 mm, 290 × 290 mm, 440 × 440 mm, and 880 × 880 mm. In practice, industry usage has largely standardised on 190 × 190 mm and larger, as smaller sizes offer limited viewing distance and are uneconomical to produce.
These signs are manufactured in accordance with South African National Standards (SANS) and are aligned with internationally recognised safety signage principles, including ISO 7010 and ISO 3864.
Selection and compliance guidance
Correct selection and sizing is important to ensure adequate visibility at the required viewing distance and effective warning before exposure to a hazard. When correctly selected and installed, Hazard Warning Signs support clear hazard communication and alignment with SANS safety signage requirements.
Guidance and further reading
- For detailed guidance on hazard warning sign meanings, symbol interpretation, and typical hazard applications, refer to the Hazard Warning Signs Explained guide.
- For a broader overview of safety sign categories, colour meanings, and selection principles, visit the Safety Signs Explained hub.
